To provide a drill jig which is able to easily determine a drilling start position by a drill, and also capable of drilling even a hole position in the innermost recess easily so as to pass through the specified position.

This drill jig is used at a time of making a hole in a desired thick position on the end face of a drilling objective material by a drill, and it is equipped with a first positioning member 1 having a contact part 2 for coming into contact with a wide surface relating to the end face of the drilling objective material, a second positioning member 11 having a drill inserting pipe 13, and being relatively shiftable to the first positioning member 1 so as to make a distance from the contact part 2 of the drill inserting pipe 13 be changed, three engaged holes 5a, 5b, 5c and an engaged projection 14 for locking a relative position between both the first and second positioning members 1 and 11, respectively. In this connection, a drill is inserted into the drill inserting pipe 13.